<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
<!-- Site Title, Description, Author, and Favicon -->
{{- with .Title | default .Site.Title }}
  <title>{{ . }}</title>
  <meta property="og:title" content="{{ . }}" />
  <meta name="twitter:title" content="{{ . | truncate 70 }}" />
{{- end }}
{{- with .Description | default .Params.subtitle | default .Summary }}
  <meta name="description" content="{{ . }}">
  <meta property="og:description" content="{{ . }}">
  <meta name="twitter:description" content="{{ . | truncate 200 }}">
{{- end }}
  <meta name="author" content="{{ .Site.Author.name }}"/>
{{- with .Site.Params.favicon }}
  <link href='{{ . | absURL }}' rel='icon' type='image/x-icon'/>
{{- end -}}
<!-- Social Media Tags -->
{{- with .Params.share_img | default .Params.image | default .Site.Params.logo }}
  <meta property="og:image" content="{{ . | absURL }}" />
  <meta name="twitter:image" content="{{ . | absURL }}" />
{{- end }}
  <meta name="twitter:card" content="summary" />
{{- with .Site.Author.twitter }}
  <meta name="twitter:site" content="@{{ . }}" />
  <meta name="twitter:creator" content="@{{ . }}" />
{{- end }}
{{- with .Site.Params.fb_app_id }}
  <meta property="fb:app_id" content="{{ . }}" />
{{- end }}
  <meta property="og:url" content="{{ .URL | absLangURL }}" />
  <meta property="og:type" content="website" />
  <meta property="og:site_name" content="{{ .Site.Title }}" />
<!-- Hugo Version number -->
  {{ .Hugo.Generator -}}
<!-- Links and stylesheets -->
  <link rel="canonical" href="{{ .URL | absLangURL }}" />
  <link rel="alternate" href="{{ "index.xml" | absLangURL }}" type="application/rss+xml" title="{{ .Site.Title }}">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.css" integrity="sha384-wITovz90syo1dJWVh32uuETPVEtGigN07tkttEqPv+uR2SE/mbQcG7ATL28aI9H0" crossorigin="anonymous">
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css" integrity="sha384-DNOHZ68U8hZfKXOrtjWvjxusGo9WQnrNx2sqG0tfsghAvtVlRW3tvkXWZh58N9jp" crossorigin="anonymous">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <link rel="stylesheet" href="{{ "css/main.css" | absURL }}" />
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic" />
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" />
  <link rel="stylesheet" href="{{ "css/pygment_highlights.css" | absURL }}" />
  <link rel="stylesheet" href="{{ "css/highlight.min.css" | absURL }}" />
{{- partial "head_custom.html" . }}
{{ template "_internal/google_analytics_async.html" . }}
</head>
